Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China.
Jinan Research Academy of Environmental Sciences, Jinan 250014, China.
Ecotoxicol Environ Saf. 2019 Jan 15;167:429-434. doi: 10.1016/j.ecoenv.2018.10.015. Epub 2018 Oct 24.
Rice (Oryza sativa) is believed to be a major source of arsenic (As) exposure in humans, especially in Asia. In this study, As accumulation, distribution and source analysis of rice are investigated in five sites (SZ, QH, XZ, WS and JX) in the Nansi Lake area, an important rice-growing region in north China. Findings show that total As average concentrations were 6.3-13.6 mg kg and 5.5-9.9 μg L in paddy soil and irrigation water, respectively. Inorganic arsenic As(III) and dimethylarsinic acid DMAs(V) were the major speciation in polished rice, with a small proportion of As(V) evident. Notably, the percentage of As(III) increased by 63.9-68.5%. Based on survey data, the addition of total As to farm soil due to fertilizer application was 31.5-11,580 mg per hectare per year. According to the results of Spearman's rank correlation analysis and Principal Component Analysis (PCA), As levels in soil and irrigation water may be important factors influencing As concentration in rice.
稻米（Oryza sativa）被认为是人类砷（As）暴露的主要来源，尤其是在亚洲。本研究调查了中国北方重要水稻种植区南四湖地区五个地点（SZ、QH、XZ、WS 和 JX）的稻米中 As 的积累、分布和来源。研究结果表明，稻田土壤和灌溉水中的总 As 平均浓度分别为 6.3-13.6 mg/kg 和 5.5-9.9 μg/L。在精米中，无机砷 As(III)和二甲基砷酸 DMAs(V)是主要形态，也存在少量的 As(V)。值得注意的是，As(III)的比例增加了 63.9-68.5%。根据调查数据，肥料施用导致农田土壤中总 As 的添加量为每年每公顷 31.5-11580mg。基于 Spearman 秩相关分析和主成分分析（PCA）的结果，土壤和灌溉水中的 As 水平可能是影响稻米中 As 浓度的重要因素。
